travis: test cross compilation

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

.gitignore

@@ -1,5 +1,6 @@
 vendor/pkg
 /runc
+/runc-*
 contrib/cmd/recvtty/recvtty
 man/man8
 release

.travis.yml

@@ -32,4 +32,4 @@ before_install:
 script:
   - git-validation -run DCO,short-subject -v
   - make BUILDTAGS="${BUILDTAGS}"
-  - make BUILDTAGS="${BUILDTAGS}" clean ci
+  - make BUILDTAGS="${BUILDTAGS}" clean ci cross

Dockerfile

@@ -1,6 +1,10 @@
 FROM golang:1.10-stretch
 
-RUN apt-get update && apt-get install -y \
+RUN dpkg --add-architecture armel \
+    && dpkg --add-architecture armhf \
+    && dpkg --add-architecture arm64 \
+    && dpkg --add-architecture ppc64el \
+    && apt-get update && apt-get install -y \
     build-essential \
     curl \
     sudo \
@@ -21,6 +25,8 @@ RUN apt-get update && apt-get install -y \
     python-minimal \
     uidmap \
     kmod \
+    crossbuild-essential-armel crossbuild-essential-armhf crossbuild-essential-arm64 crossbuild-essential-ppc64el \
+    libseccomp-dev:armel libseccomp-dev:armhf libseccomp-dev:arm64 libseccomp-dev:ppc64el \
     --no-install-recommends \
     && apt-get clean
 

Makefile

@@ -1,6 +1,7 @@
 .PHONY: all shell dbuild man release \
 	    localtest localunittest localintegration \
-	    test unittest integration
+	    test unittest integration \
+	    cross localcross
 
 GO := go
 
@@ -105,7 +106,7 @@ uninstall-man:
 	rm -f $(addprefix $(MAN_INSTALL_PATH),$(MAN_PAGES_BASE))
 
 clean:
-	rm -f runc
+	rm -f runc runc-*
 	rm -f contrib/cmd/recvtty/recvtty
 	rm -rf $(RELEASE_DIR)
 	rm -rf $(MAN_DIR)
@@ -117,6 +118,15 @@ validate:
 
 ci: validate test release
 
+cross: runcimage
+	docker run -e BUILDTAGS="$(BUILDTAGS)" --rm -v $(CURDIR):/go/src/$(PROJECT) $(RUNC_IMAGE) make localcross
+
+localcross:
+	CGO_ENABLED=1 GOARCH=arm GOARM=6 CC=arm-linux-gnueabi-gcc $(GO) build -buildmode=pie $(EXTRA_FLAGS) -ldflags "-X main.gitCommit=${COMMIT} -X main.version=${VERSION} $(EXTRA_LDFLAGS)" -tags "$(BUILDTAGS)" -o runc-armel .
+	CGO_ENABLED=1 GOARCH=arm GOARM=7 CC=arm-linux-gnueabihf-gcc $(GO) build -buildmode=pie $(EXTRA_FLAGS) -ldflags "-X main.gitCommit=${COMMIT} -X main.version=${VERSION} $(EXTRA_LDFLAGS)" -tags "$(BUILDTAGS)" -o runc-armhf .
+	CGO_ENABLED=1 GOARCH=arm64 CC=aarch64-linux-gnu-gcc $(GO) build -buildmode=pie $(EXTRA_FLAGS) -ldflags "-X main.gitCommit=${COMMIT} -X main.version=${VERSION} $(EXTRA_LDFLAGS)" -tags "$(BUILDTAGS)" -o runc-arm64 .
+	CGO_ENABLED=1 GOARCH=ppc64le CC=powerpc64le-linux-gnu-gcc $(GO) build -buildmode=pie $(EXTRA_FLAGS) -ldflags "-X main.gitCommit=${COMMIT} -X main.version=${VERSION} $(EXTRA_LDFLAGS)" -tags "$(BUILDTAGS)" -o runc-ppc64le .
+
 # memoize allpackages, so that it's executed only once and only if used
 _allpackages = $(shell $(GO) list ./... | grep -v vendor)
 allpackages = $(if $(__allpackages),,$(eval __allpackages := $$(_allpackages)))$(__allpackages)